Chamberlain GS400D Owner's Manual page 19

SECURE GATE BRACKET TO GATE
9
Remove operator from brackets. Mark and drill holes in gate or reinforcement (if necessary) according to gate
bracket mounting hardware. Secure gate bracket to gate using hardware (not provided).
NOTE: The gate bracket can be secured to the gate using a welder (optional).
SECURE POST BRACKET TO GATE POST
10
Mark holes for post bracket. Remove clamp. Drill clearance holes for 3/8"-16 bolt in gate post.
NOTE: The post bracket can be secured to the gate post using a welder (optional).
Secure post bracket to gate post using hardware. Keep gate operator level.
Lock Down Bolt 1/4"-20
Lock Washers
Hex Nuts
Flat Washers
Gate
Bracket
Carriage Bolts
19
5/16"-18 U-Bolt
Hex Nut
Lock Washer
Flat Washer
NOTE: For mounting on flat
surfaces, use 4 5/16"-18 Hex Bolts
through slots instead of U-Bolts.
Welder (Optional)
Installation